Meta: Remove unused (and non-existent) linkages from the GN build

Meta/gn/secondary/Ladybird/BUILD.gn

@@ -66,7 +66,6 @@ executable("ladybird_executable") {
     "//AK",
     "//Userland/Libraries/LibCore",
     "//Userland/Libraries/LibFileSystem",
-    "//Userland/Libraries/LibGUI",
     "//Userland/Libraries/LibGfx",
     "//Userland/Libraries/LibIPC",
     "//Userland/Libraries/LibImageDecoderClient",

Meta/gn/secondary/Userland/Libraries/LibJS/BUILD.gn

@@ -12,16 +12,13 @@ shared_library("LibJS") {
     "//Userland/Libraries/LibCore",
     "//Userland/Libraries/LibCrypto",
     "//Userland/Libraries/LibFileSystem",
-    "//Userland/Libraries/LibJIT",
     "//Userland/Libraries/LibLocale",
     "//Userland/Libraries/LibRegex",
     "//Userland/Libraries/LibSyntax",
     "//Userland/Libraries/LibTimeZone",
     "//Userland/Libraries/LibUnicode",
   ]
-  if (current_cpu == "x86" || current_cpu == "x64") {
-    deps += [ "//Userland/Libraries/LibX86" ]
-  }
+
   sources = [
     "AST.cpp",
     "Bytecode/ASTCodegen.cpp",